Swans swim over a lake, with the air temperature at about minus 35 degrees Celsius as steam ascends above the water during sunset near the village of Urozhainy, Sovetsky district of Altai region, Russia, on January 26. About 600 swans annually hibernate on the lake heated by warm springs, where they are also fed by yagers which helps them to survive severe winters. Reuters/Andrei Kasprishin